If you are looking for a good first fingertip ball, the Power Grooves from Brunswick offer a good value for the money. For oily lanes, the Black Sparkle with particles is quite strong, and the shiny PK17 pearl balls are a very good choice for dryer lanes with a clean backend. You can keep your polyester/viz-a-ball as a spare ball.
Nevertheless, check out your local pro shop or have a trainer make suggestions for ball depending on your style, speed and local lane condition.
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DizzyFugu --- Reporting from Germany
"All that we see or seem, is but a dream within a dream..." - Edgar Allen Poe